Alert archive / Wyoming / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 118, NWS Cheyenne, WY

July 21, 2020Goshen County, Laramie County, Platte County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 21, 2020, 6:44 PM MDT for Goshen County, Laramie County, Platte County, Wyoming. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 21, 2020, 6:44 PM MDT (00:44 UTC)
Expired: Jul 21, 2020, 7:45 PM MDT
In force: 61 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Goshen County, WY, Laramie County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 78 km from the middle of the area, began a volume at 00:46 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 21, 1:33 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 21, 6:02 PM MDT, 42 minutes before

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Special weather statement, Jul 21, 6:04 PM MDT, 40 minutes before

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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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Special weather statement, Jul 21, 6:43 PM MDT, 1 minute before

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<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 21, 6:02 PM MDT	Special Weather Statement	CYS	Niobrara	43 min
Jul 21, 6:04 PM MDT	Special Weather Statement	CYS	Converse	41 min
Jul 21, 6:43 PM MDT	Special Weather Statement	CYS	Converse	47 min
Jul 21, 6:54 PM MDT	Special Weather Statement	CYS	Laramie	51 min
Jul 21, 7:03 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	42 min
Jul 21, 7:37 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	53 min
Jul 21, 7:40 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	80 min
Jul 21, 7:42 PM MDT	Special Weather Statement	CYS	Laramie	48 min
Jul 21, 8:10 PM MDT	Special Weather Statement	CYS	Laramie	50 min
Jul 21, 8:17 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	62 min
Jul 21, 6:49 PM MDT	Special Weather Statement	CYS	Cheyenne	41 min
Jul 21, 7:25 PM MDT	Special Weather Statement	CYS	Kimball	50 min
Jul 21, 7:31 PM MDT	Special Weather Statement	CYS	Cheyenne	44 min
Jul 21, 7:32 PM MDT	Special Weather Statement	CYS	Cheyenne	43 min
Jul 21, 8:07 PM MDT	Special Weather Statement	CYS	Cheyenne	38 min
Jul 21, 8:12 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne, Morrill	63 min
Jul 21, 8:55 PM MDT	Special Weather Statement	CYS	Cheyenne	50 min
Jul 22, 12:19 AM MDT	Special Weather Statement	CYS	Cheyenne	26 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2020 Every severe thunderstorm warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.